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Sunlight and the Arctic AIOS Goals 1.Enhance our understanding of the present role that solar radiation plays in the Arctic AIOS 2.Improve our ability to predict its future role. Objectives 1.Determine the spatial and temporal variability of the partitioning of solar energy. 2.Understand how changes in sea ice, snow cover, and cloudiness will affect the solar partitioning and the resulting impacts. 3.Assess the impact of seasonal, interannual, and decadal variability on absorbed sunlight. 4.Establish if the variability of solar heating corresponds to the dominant modes of large-scale variability (e.g., Arctic Oscillation). 5.Evaluate and improve the treatment in models of solar energy in the Arctic AIOS. Where does all the sunlight go?